Scientists have been observing changes in the climate that cannot be attributed solely to natural influences. These changes are occurring rapidly, are significant, and will have consequences for this and future generations. Changes in climate variability and extremes driven by human-induced climate change are some of the key challenges facing humanity.

World Meteorological Day takes place every year on 23 March and commemorates the coming into force on 23 March 1950 of the Convention establishing the World Meteorological Organization. It showcases...

The ever-growing global population faces a wide range of hazards such as tropical cyclone storm surges, heavy rains, heatwaves, droughts and many more. Long-term climate change is increasing the intensity...

The WMO Global Campus is a collaborative network of institutions and National Meteorological Hydrological Services involved in the development and delivery of education and training in meteorology, climatology, hydrology and other related sciences. It is built on the synergies, sharing and cooperation between these institutions and will address global priorities and the growing and changing requirements and needs for learning in the community.

WMO supports UNFCCC through a wide range of scientific and technical inputs, including its support through the IPCC, thereby contributing to adaptation, mitigation and capacity development. Every year, WMO participates in sessions of the Conference of Parties (COP) of UNFCCC, providing the latest scientific advice and information to governments, including the Statement on the State of the Global Climate and the Greenhouse Gas Bulletin.

Regional Climate Outlook Forums (RCOFs) produce consensus-based, user-relevant climate outlook products in real time through regional cooperation and partnership in order to reduce climate-related risks and support sustainable development for the coming season in sectors of critical socioeconomic significance for the region in question.

Data repositories and archives play a critical role as the source for the observational data used in the study of weather and climate. After over two centuries of recording observations on physical media – and the last 20 years on digital media – these records are at risk.

Clouds play a pivotal role in weather forecasts and warnings. They help to drive the water cycle and the entire climate system. Throughout history, they have inspired artists, poets, musicians, photographers and countless other enthusiasts.